Ferroelectricity Induced by Ordering of Twisting Motion in a Molecular Rotor

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	Ferroelectricity Induced by Ordering of Twisting Motion in a Molecular Rotor
	Zhang, Yi 1; Zhang, Wen 1; Li, Shen-Hui 2; Ye, Qiong 1; Cai, Hong-Ling 1; Deng, Feng 2; Xiong, Ren-Gen 1; Huang, Songping D.3
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2012-07-04
卷号	134 期号:26 页码:11044-11049
英文摘要	A novel mononuclear metal-organic compound, [Cu-(Hdabco)(H2O)Cl-3] (1, dabco = 1,4-diazabicyclo[2.2.2]octane) in which the Cu-II cation adopts a slightly distorted bipyramidal geometry where the three Cl anions constitute the equatorial plane and the Hdabco cation and H2O molecule occupy the two axial positions, was synthesized. Its paraelectric-to-ferroelectric phase transition at 235 K (T-c) and dynamic behaviors were characterized by single crystal X-ray diffraction analysis, thermal analysis, dielectric and ferroelectric measurements, second harmonic generation experiments, and solid-state nuclear magnetic resonance measurements. Compound 1 behaves as a molecular rotor above room temperature in which the (Hdabco) part rotates around the N center dot center dot center dot N axis as a rotator and the [Cu(H2O)Cl-3] part acts as a stator. In the temperature range 235-301 K, a twisting motion of the rotator is confirmed. Below the T, the motions of the rotor are frozen and the molecules become ordered, corresponding to a ferroelectric phase. Origin of the ferroelectricity was ascribed to relative movements of the anions and cations from the equilibrium position, which is induced by the order disorder transformation of the twisting motion of the molecule between the ferroelectric and paraelectric phases. Study of the deuterated analogue [Cu(Ddabco)(D2O)Cl-3] (2) excludes the possibility of proton ordering as the origin of the ferroelectricity in 1.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Multidisciplinary
研究领域[WOS]	Chemistry
关键词[WOS]	PHASE-TRANSITION ; CRYSTALS ; DYNAMICS ; FRAMEWORKS
收录类别	SCI
语种	英语
WOS记录号	WOS:000305863900052
公开日期	2015-07-14
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/1674]
专题	武汉物理与数学研究所_磁共振应用研究部
作者单位	1.Southeast Univ, Ordered Matter Sci Res Ctr, Nanjing 211189, Jiangsu, Peoples R China 2.Chinese Acad Sci, Wuhan Ctr Magnet Resonance, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom Mol Phys, Wuhan 430071, Peoples R China 3.Kent State Univ, Dept Chem, Kent, OH 44240 USA
推荐引用方式 GB/T 7714	Zhang, Yi,Zhang, Wen,Li, Shen-Hui,et al. Ferroelectricity Induced by Ordering of Twisting Motion in a Molecular Rotor[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2012,134(26):11044-11049.
APA	Zhang, Yi.,Zhang, Wen.,Li, Shen-Hui.,Ye, Qiong.,Cai, Hong-Ling.,...&Huang, Songping D..(2012).Ferroelectricity Induced by Ordering of Twisting Motion in a Molecular Rotor.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,134(26),11044-11049.
MLA	Zhang, Yi,et al."Ferroelectricity Induced by Ordering of Twisting Motion in a Molecular Rotor".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 134.26(2012):11044-11049.